From a7e3df85fd7180aa0daf0947e50b08d51b7e2380 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 3 Jul 2015 20:08:05 +0200
Subject: Add support for defining views as class template instantiations

---
 NEWS           |  5 +++++
 odb/common.cxx |  4 ++--
 odb/common.hxx |  2 +-
 odb/pragma.cxx | 13 ++++++++++---
 4 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/NEWS b/NEWS
index 548774e..030073f 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,8 @@
+Version 2.5.0
+
+ * Support for defining views as instantiations of C++ class templates,
+   similar to objects and composite value types.
+
 Version 2.4.0
 
  * Support for object loading views. Object loading views allow loading of
diff --git a/odb/common.cxx b/odb/common.cxx
index 6d341b8..21475d3 100644
--- a/odb/common.cxx
+++ b/odb/common.cxx
@@ -551,9 +551,9 @@ check (semantics::typedefs& t)
   if (ci == 0)
     return false;
 
-  // It must be an object or composite value.
+  // It must be an object, view, or composite value.
   //
-  if (!object (*ci) && !composite (*ci))
+  if (class_kind (*ci) == class_other)
     return false;
 
   // This typedef name should be the one that was used in the pragma.
diff --git a/odb/common.hxx b/odb/common.hxx
index ef85a4b..170b33c 100644
--- a/odb/common.hxx
+++ b/odb/common.hxx
@@ -440,7 +440,7 @@ private:
   columns columns_;
 };
 
-// Traverse objects and composite values that are class template
+// Traverse objects, views, and composite values that are class template
 // instantiations.
 //
 struct typedefs: traversal::typedefs, context
diff --git a/odb/pragma.cxx b/odb/pragma.cxx
index 046140e..11e1d4e 100644
--- a/odb/pragma.cxx
+++ b/odb/pragma.cxx
@@ -4335,8 +4335,8 @@ register_odb_pragmas (void*, void*)
 void
 post_process_pragmas ()
 {
-  // Make sure object and composite class template instantiations are fully
-  // instantiated.
+  // Make sure object, view, and composite class template instantiations
+  // are fully instantiated.
   //
   for (decl_pragmas::iterator i (decl_pragmas_.begin ()),
          e (decl_pragmas_.end ()); i != e; ++i)
@@ -4349,7 +4349,7 @@ post_process_pragmas ()
     if (!(CLASS_TYPE_P (type) && CLASSTYPE_TEMPLATE_INSTANTIATION (type)))
       continue;
 
-    // Check whether this is an object or composite value type.
+    // Check whether this is an object, view, or composite value type.
     //
     pragma const* p (0);
     string diag_name;
@@ -4365,10 +4365,17 @@ post_process_pragmas ()
         diag_name = "persistent object";
         break;
       }
+      else if (name == "view")
+      {
+        p = &*j;
+        diag_name = "view";
+        break;
+      }
       else if (name == "value")
       {
         p = &*j;
         diag_name = "composite value";
+        break;
       }
       // We don't want to instantiate simple values since they may be
       // incomplete.
-- 
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